求教：ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'requestMappingHandlerMapping' defined in class path resource [org/springframework/boot/autoconfigure/web/servlet/WebMvcAutoConfiguration$EnableWebMvcConfiguration.class]: Invocation of init method failed; nested exception is java.lang.IllegalStateException: Invalid mapping on handler class [com.miaoshaproject.controller.UserController]: public com.miaoshaproject.response.CommonReturnType com.miaoshaproject.controller.UserController.register(java.lang.String,java.lang.String,java.lang.String,java.lang.String,java.lang.String,java.lang.String) throws com.miaoshaproject.error.BusinessException